Carbureter.



y H. H. Boom. GARBURETER. APPLIUA/TION ULEB JUNE 17, 1908= 930,724. Emme@ Aug. io, 1909.

im TED srATns PATENT enema.)v

- HARRY n. BooaE, or Los ANeELEs, CALIFORNIA.

'Hasso-,724.

specifi-cation of Letters Patent.

Patented Aug.' 1o, 190e.

Application led .Tune 17, 1968. Serial 1510'A439d164.`

tovary the oil and air supply `in correspond-f fence with the requirements. l rl .`he accompanying drawings' illustrate the invention, and referring thereto z-Fi'gure 1 is a vertical section-of the carbureter. Fig. 2l is ahorizontal section thereof on line xz-z Fi 1. Fig. 3 is a detail sectionfof the mov- 20 abe 'valve member. Fig. 4 is a'horizontal section showing the air valve in nearly closed position.

The carbureter comprises a body 1 formed with a vertical passage or air inlet chamber g5 2, a fuel reservoir 3 anda fuel duct '4 leading `from said reservoir and, ,extending through a nozzle piece 5 'which projects from the wall ofchamber 2 to the center of said chamber 2 an`d thence extends upwardly, terminating '30 at its upper end in a seat 6 for the fuel valve, nd an upwardly flaring lip 7 above said seat. The fuel valve'32 extends within the air inlet chamber or passage 2, and is movable relatively to the oil outlet to open and close' 35 .said outlet, so that the oil issuingthrough said outlet is coniined by the valve member v to produce the maximum atomizing effect. The fuel reservoir 3 may be of any suitable 'construction'being shown as provided with a oclosure cap 8 formed with a guide 9 for the `spindle 10 of a float 11, the lower end of said spindle being formed with a valvc 12 corresponding with a seat 13 in the passage 14 f leading to the 'reservoirfrom an oil supply 45 yconnection- 15 which the oil supply pipe 16 connects. An air inlet fitting 18 is attached 'to the bottom of the air inlet chamber 2, and a mixture chamber 20' is attached to the top of said chamber 2 and is provided with a lateral mixture inlet 21 adapted for connection to theengine. i 4 Communication between the air inlet chamber and the mixture chamber is controlled by an airvalve-Whose seat is formed as a '55 conical member 22 converging 'upwardly and having -a peripheral flange 23 and held from rotation by a key 24. The movable Aair valve member 25 is also conical, to fit linside the member 22 and works between the member 22 and the top of body 1, and 60 has a flange 26 fitting within the flange 23. Ay cap piece 2 8, fastened at the top of chamber 20, isl formed with a tapped openlng 29 in which works a left hand screw threaded member 30, this member' being 65 internally screw threaded to receive the lscrew threadedl spindle 31 of the needle valve 32, said spindle having an operating thumb.piece or handle'3`3 to enable its vertical-adjustment relative to the fuel valve seat aforesaid. The air and fuel valves and their operating screw-members 30, 31 are coaxial with the fuel outlet. A lock nut 34, screwing on this spindle, engages with the upper end of the member 30 to lock the 75 members 31, 30 together so that in normal operation they turn as one piece. A lever 36, secured to .member 30 by means of clamp screw 37, servesfor operation of the air valve by connection with any suitable means, for example, the usual link operated by a controller or hand lever. A s ring 38 surrounding an extension 39 of mem er 30 and extending between a shoulder 40 of'said member 30 and the top of valve seat member 22, serves to hold said valve seat member with yielding pressure on the top of the rotary'valve member, insuring 'a working fit without unduev friction and allowing for wear of the screw threaded member 30. The valve spindle 31 is provided. with keys or feathers 41 working in vertical grooves orkeyways 42 in the rotatively movable valve member 25, so that said valve member is caused to turn with said spindle, but adjustment of the said-spindle is permitted vrelatively to the valve member to enable adjustment of the regulationof the oil supply relatively to the air supply. The valve seat member 22 isv also notched or, grooved, as at 43, to enable insertion of the valve spindle therethrough.' The valve seat .member 22 and the rotary valve member 25 are provided with ports 44, 45 whose.side walls 46 converge upwardly and inwardly but at a'less angle than would beVv the case with dlreet radial convergence, so that' in relative rotation of these members from closed position the opening will first be formed 'at the upper ends of the ports, and in further rotation the 110 opening will gradually extend toward the lower end, at the same time increasing at the Vposition, and locked by nut 34, the throttle ever 36 is operated to'move the valve member 25 to partly open the ports 44, 45 as much as may be desired. This movement operates by means of the screw thread 47 of member 30, 'which is preferably a left handed screw, to slightly lift the needle valve and open the discharge outlet for fuel, said outlet being above the normal level of fuel in tank 39, controlled by iioat 11, so that the fuel only flows in response to suction from the engine. At each suction of the engine air is drawn through the ports 44, 45 and the condition of suction also causes the fuel to flow over the lip 7 .and to be taken up by the air passing to said ports. `When the valve is but slightly o pen, as shown in Fig. 4, the openings are close to the center,

yso that the current of air is-confined toward the oil outlet, and maximum entraining effect is secured, and as the valve is further opened, the current Zone spreads outwardly, so that under all conditions the oil is eifectually taken up by the air, and no matter' how little air is admitted its flow is concentrated so as to take up the oil. The movements of the fuel valve 25]. and the rotary air valve member 25 are proportioned so that the amount of fuel and air admitted is in correspondence, and any desired ratio of correspondence or of variation may be obtained by suitably forming or curving the needle 32 of the fuel valve and the side walls 46 of the air valve ports. The air valve being conical and surrounding the oil outlet, deflects and concentrates the current of air toward the oil supply. The angle of the thread on screw threaded member regulates the proportion of oil supplied. The openings in air valve members are shaped to proportion the air supply to the oil inlet. yFor this purpose the edges of the openings or ports are less than radially` convergent, and are slightly curved, to give the pro er variation.

' hat I claim is l. A carbureter comprising a body formed with an air passage, a fuel supply means havj ing an outlet in said air passage, a fuel valve extending in the air passage and movable relatively to said outlet to open and close said outlet, a mixture outletconnection, and a rotary air valve cont-rolling communication from |said passage to said outlet connection, said air valve provided with radial ports which open initially at their portions nearest to the fuel outlet.

2. Acarbureter comprising a body having an air passage, a fuel supply means extending and discharging into said passage, a fuel valve coperating with and controlling said outlet, a screw member4 carrying said fuel valve, means for rotating said screw member Vto cause operation of the fuel valve by the screwing motion of said member, a mixture outlet means, an air valve controlling communication from the aforesaid passage to said mixture outlet means, said Vair valve comprising a nonrotative member, and a movable member connected to be operated by the rotation of said screw member the rotative and non-rotativemembers of the air valve formed as upwardly converging cones over and surrounding the fuel outlet, and provided with ports adapted to initially open at the lower end of the ports nearest the fuel valve outlet and to spread the opening radially as the valve is opened further.

S. A carbureter comprising a body having an air passage, a fuel supply means extending and discharging into said passagQ; it. fuel valve cooperating with and controllinfy said outlet, a screw member carrying said fuel valve, means for rotating said screw member to cause operation of the fuel valve by the screwing motion of said lmember, a mixture outlet means, an air valve controlling communication from'the aforesaid passage to said mixture outlet means, said air valve comprising a nonrotative member, a movable member connected to be operated by the rotation of said screw member, and a spring engaging the screw member to take up wear thereof the rotative and non-rotative members of the air valve formed as upwardly converging cones over and surroundin the fuel outlet7 and provided with ports a apted to initially open at the -lower end of the ports nearest the fuel valve outlet and to spread the opening radially as the valve i opened further.

4. A carbureter comprising abody having an air passage, a fuel supply means extending and discharging into said passage, a fuel valve cooperating 'with and controllin(r said outlet, a screw member carrying said' fuel valve, means for rotating said screw member to cause operation of the fuel valve by the screwing motion of said member, a mixture outlet means, an air-valve controlling communication from the aforesaid passage to said mixture outlet. means, said air valve comprising a nonrotative member a movable member connected to beoperated by the rotation of said screw means, and operating means for the fuel valve screwing within said screw member to adjust the fuel valve relatively to the air valve said valves and their operating screw-members being With an air passage, a fuel supply means having an outlet in said air passage, a fu'el valve coperating with andcontrolhng said outlet, said outlet being formed'with an upwardly Haring seat for said valve, a mixture outlet connection, and an air valve controlling communication from said l passage to said. outlet connection, said air valve provided with ports which open initially at theirportions nearest to the fuel outlet, the air valvebe'ing conical and surrounding the oil outlet. 6. A carburetor comprising a body formed with an air'passage, a fuel supply means having an outlet in said air passagaa fuel valve coperating With and controlling said outlet, a mixture outlet connection, and an air valve controlling communication from said passage to said outlet connection, said air valve consisting of a member having ports and a rotative member provided with ports whose edges are shaped to copeate with the edges of the aforesaid ports so that the opening is initially at their portions nearest munication from said passage to said outlet,y

connection, said air valve provided With,

ports which open-initially at their portions nearest to the fuel outlet, the air valve being conical and surrounding the oil outlet, the fuel `valve and the air valve ports being shaped to vary the oil and air supply in correspondenoe.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 10th day of June 1,908.

HARRY H. BooRE.

In presence of F. M. TOWNSEND, J. T. KE'OUGH. 

